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应用心内电生理检查。对９例可诱发持续性室上性心动过速（ＳＶＴ）病人进行电药理学试验，结果发现：静脉注射普罗帕酮延长房室及室房传导间期，延长房室及室房传导系统功能不应期，使８／９病人不能再诱发持续性ＳＶＴ；静脉滴注异丙肾上腺素（ＩＳＯ）能逆转普罗帕酮的电生理作用，并使１／８病人重新诱发持续性ＳＶＴ，５／８病人非持续性ＳＶＴ的持续间期延长，ＩＳＯ逆转普罗帕酮效应能被普萘洛尔阻断。研究提示，在交感神经兴奋状态下，即使口服经临床电药理学试验证实有效的药物，部分病人仍可能复发ＳＶＴ。对于这部分病人可预防性联合应用β受体阻滞剂
Application of electrophysiological examination. Nine patients who could induce sustained supraventricular tachycardia (SVT) were electro-pharmacologically tested and found that intravenous propafenone prolonged the conduction interval between atrioventricular and ventricular conduction and prolonged the function of atrioventricular and ventricular conduction systems Refractory period, 8/9 patients can no longer induce persistent SVT; intravenous infusion of isoproterenol (ISO) can reverse the electrophysiological effects of propafenone, and 1/8 patients re-induced persistent SVT, 5 / 8 Patients with non-sustained SVT prolonged intermission, ISO reversal propafenone effect can be blocked by propranolol. Research suggests that in the sympathetic state of excitement, some patients may still have a relapse of SVT despite oral administration of a drug that is clinically proven by electrophysiology. For this part of the patient prophylactic combination of β-blockers